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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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Adding a pump overrun
replying to Ed Sirett, swoopdave wrote:
What keeps the 3 way valve open to the rads while its over running? -- for full context, visit https://www.homeownershub.com/uk-diy...run-33024-.htm |
#2
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Adding a pump overrun
On 20/09/2017 20:14, swoopdave wrote:
replying to Ed Sirett, swoopdave wrote: What keeps the 3 way valve open to the rads while its over running? Electricity? This must be a record for homeownershub - a question posted 14 years ago -- mailto: news {at} admac {dot] myzen {dot} co {dot} uk |
#3
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Adding a pump overrun
On 20/09/2017 20:14, swoopdave wrote:
replying to Ed Sirett, swoopdave wrote: What keeps the 3 way valve open to the rads while its over running? I presume this is reply to a very ancient post since Ed has not posted hear for ages. However you will probably find what you need he http://wiki.diyfaq.org.uk/index.php/...Pump_Ov errun -- Cheers, John. /================================================== ===============\ | Internode Ltd - http://www.internode.co.uk | |-----------------------------------------------------------------| | John Rumm - john(at)internode(dot)co(dot)uk | \================================================= ================/ |
#4
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Adding a pump overrun
In article ,
swoopdave m writes: replying to Ed Sirett, swoopdave wrote: What keeps the 3 way valve open to the rads while its over running? Why does it matter which way it's open during overrunning? -- Andrew Gabriel [email address is not usable -- followup in the newsgroup] |
#5
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Adding a pump overrun
On 22/09/2017 10:33, Andrew Gabriel wrote:
In article , swoopdave m writes: replying to Ed Sirett, swoopdave wrote: What keeps the 3 way valve open to the rads while its over running? Why does it matter which way it's open during overrunning? If its open to the DHW, and that is already satisfied, you won't dump much additional heat from the primary circuit into the cylinder - and will lose more out of the flue than you would expect if overruning through the rads. -- Cheers, John. /================================================== ===============\ | Internode Ltd - http://www.internode.co.uk | |-----------------------------------------------------------------| | John Rumm - john(at)internode(dot)co(dot)uk | \================================================= ================/ --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus |
#6
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Adding a pump overrun
On 22/09/2017 16:53, John Rumm wrote:
On 22/09/2017 10:33, Andrew Gabriel wrote: In article , swoopdave m writes: replying to Ed Sirett, swoopdave wrote: What keeps the 3 way valve open to the rads while its over running? Why does it matter which way it's open during overrunning? If its open to the DHW, and that is already satisfied, you won't dump much additional heat from the primary circuit into the cylinder - and will lose more out of the flue than you would expect if overruning through the rads. And if it dumps it to the CH, and all the rads have TRVs which are closed, it won't have anywhere at all to go. -- Cheers, Roger ____________ Please reply to Newsgroup. Whilst email address is valid, it is seldom checked. |
#7
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Adding a pump overrun
On 22/09/2017 22:35, Roger Mills wrote:
On 22/09/2017 16:53, John Rumm wrote: On 22/09/2017 10:33, Andrew Gabriel wrote: In article , swoopdave m writes: replying to Ed Sirett, swoopdave wrote: What keeps the 3 way valve open to the rads while its over running? Why does it matter which way it's open during overrunning? If its open to the DHW, and that is already satisfied, you won't dump much additional heat from the primary circuit into the cylinder - and will lose more out of the flue than you would expect if overruning through the rads. And if it dumps it to the CH, and all the rads have TRVs which are closed, it won't have anywhere at all to go. Wouldn't that have been happening before the boiler turned off? |
#8
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Adding a pump overrun
On 23/09/2017 02:03, Fredxxx wrote:
On 22/09/2017 22:35, Roger Mills wrote: On 22/09/2017 16:53, John Rumm wrote: On 22/09/2017 10:33, Andrew Gabriel wrote: In article , swoopdave m writes: replying to Ed Sirett, swoopdave wrote: What keeps the 3 way valve open to the rads while its over running? Why does it matter which way it's open during overrunning? If its open to the DHW, and that is already satisfied, you won't dump much additional heat from the primary circuit into the cylinder - and will lose more out of the flue than you would expect if overruning through the rads. And if it dumps it to the CH, and all the rads have TRVs which are closed, it won't have anywhere at all to go. Wouldn't that have been happening before the boiler turned off? The boiler would probably cycle off on its own stat in the circumstance. Just one of those cases of not being able to win em all! -- Cheers, John. /================================================== ===============\ | Internode Ltd - http://www.internode.co.uk | |-----------------------------------------------------------------| | John Rumm - john(at)internode(dot)co(dot)uk | \================================================= ================/ --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus |
#9
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Adding a pump overrun
In article ,
John Rumm wrote: And if it dumps it to the CH, and all the rads have TRVs which are closed, it won't have anywhere at all to go. Wouldn't that have been happening before the boiler turned off? The boiler would probably cycle off on its own stat in the circumstance. Just one of those cases of not being able to win em all! Thought it wasn't recommended to have TRVs on every rad? I have none in the living room and that's where the main temperature sensor is. Every other rad has a TRV. -- *Since light travels faster than sound, some people appear bright until you hear them speak. Dave Plowman London SW To e-mail, change noise into sound. |
#10
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Adding a pump overrun
On 23/09/2017 10:01, Dave Plowman (News) wrote:
In article , John Rumm wrote: And if it dumps it to the CH, and all the rads have TRVs which are closed, it won't have anywhere at all to go. Wouldn't that have been happening before the boiler turned off? The boiler would probably cycle off on its own stat in the circumstance. Just one of those cases of not being able to win em all! Thought it wasn't recommended to have TRVs on every rad? Its isn't generally - although you do find some systems that have no main stat and have all TRVs. (Some systems have a bypass to ensure there is always an available path for flow, and some modern boilers include an internal one (as does my Vaillant for example)). I have none in the living room and that's where the main temperature sensor is. Every other rad has a TRV. Yup, similar arrangement here - although I have a second zone upstairs where all the rads have TRVs, you get enough heat leakage into the landing (where the zone stat is) from downstairs to satisfy that stat anyway. -- Cheers, John. /================================================== ===============\ | Internode Ltd - http://www.internode.co.uk | |-----------------------------------------------------------------| | John Rumm - john(at)internode(dot)co(dot)uk | \================================================= ================/ --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus |
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